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Question

Construct a rhombus ABCD where AC=6 cm and BD=7 cm. Then, perimeter of rhombus ABCD is:

A
16.2 cm
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B
18.7 cm
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C
17.8 cm
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D
18.4 cm
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Solution

The correct option is D 18.4 cm
1. Draw a diagonal AC=6 cm.
2. Draw a perpendicular bisector of AC, let the perpendicular bisector and AC intersects at O ( Diagonals of rhombus intersects at right angle)
3. Taking O as centre and half of the length of another diagonal (i.e 3.5 cm) as radius, mark arc on the perpendicular bisector at both sides of AC. Name these intersection points as B and D
4. Join AB,AD,BC,CD.
5. ABCD is the required rhombus.
6. Measure the length of any one side ( All sides of rhombus are equal), which come out to be 4.6 cm

Perimeter of rhombus =4× side =4×4.6=18.4 cm

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